Car-truck side frame



Dec. 6, 1927. 1,652,002

H. E, DOERR GAR TRUCK SIDE FRAME Filed April 1927 Rig.

HARRY 6. OOERR.

71- TO RNEY6.

Patented Dec. 6, 1927.

SATE

OFFICE;

OF ST. LOUIS, MISSOURI, A

' CAR-TRUCK RY E. DOEBR, OF ST. LOUIS, MISSOURI, ASSIGNOR 1'0 SCULIJINSTEEL COMPANY,

CORIEORATION 0F DELAWARE.

SIDE FRAME.

Application filed April 30, 1927. Serial No. 18?,886.

This invention relates to car truck side frames of the type that areequipped with integral journal boxes.

lhe object of my invention is to provide a strong and rigid car truckside frame of the general type mentioned whose top member is not apt tobuckle when in service or under test, even though said top member ismade relatively wide and is so disposed with relation to the journal boxthat the adjacent side bearing on thetruck bolster will be spaced theproper distance from said top member:

To this end I have devised a car truck sideframe provided with integraljournal boxes and equipped with'a top member whose center line isstraight and disposed in such relation with said journal boxes that thecenter line of said top member is offset outwardly or arranged on theoutsideof the centerlines of the, journals of the truck axles. Byconstructing the side frame in this manner it is possible to make thetop member of said frame wide enough to impart sufiicient transversestrength to said top member to comply with the specifications of a sideframe that is intended to be used on the truck of a car of largecapacity, for example, a 4=0-ton car, and still maintain the requiredspacing between the top members of the side frames and the side hearingson the truck bolster. Moreover, as the top member of the side frame isstraight, instead of being bowed inwardly at its ends, as has heretoforebeen the usual practice in truck side frames for cars of large capacity,the side frame is symmetrical and there is little tendency forthe topmember of same to buckle when the frame is in service or under test.

Figure 1 of the drawings is a top plan view of a portion of a car truckside frame constructed in accordance withv my invention. Figure 2 is aside elevational view of said frame; and

Figure 3 is a transverse sectional view of the top member of the sideframe, showing said member arranged in proper spaced relation with theadjacent bearing on the truck bolster.

Referring to the drawings which illustrate the preferred form of myinvention, A designates a car truck side frame that is provided withintegral journal boxes B. Instead of making the top member of the side-:t'rame of bowed shape, with its end portions disposed in verticalalignment with the celit-erv lines of the journals of the truck axles,and with its intermediate portion offset. out: wardly, as has heretoforebeen the practice in car truck side frames provided with a relativelywide top member, for example, a top member six inches in width, the topmember 1 of my improved side frame is straight throughout its entirelength and the center linem of said top member is olfset outwardly withrelation to the center line 3 of the axle journals, as shown inFigure 1. By making tlie'top member of the side frame. straight insteadof bowed inwardly at its ends, I produce a symmetrical side frame thatis capable of successfully standing up under great loads and strains andwhose top member is spaced the proper distance from the adjacent sidebearing (1 of the'truck bolster D, even when said top member isexceptionally wide, as shown in Figure 3.

Having thus described my invention, what I claim as new and desire tosecure by Let ters Patent is:

1. A car truck side frame provided with integral journal boxes andwitha-top member vwhose center line is straight and offset outwardly withrelation to the center lines of the journals of the truck axles.

2. A car truck side frame provided with a straight top member whose endportions and intermediate portion lie in the same vertical plane, andjournal boxes formed in tegral with the end portions of said side frameand disposed so that the center line of said top member is offsetoutwardly with relation to the center lines of the axle journals.

HARRr'E. DOERR-

